Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Head driving structure
Patent
1992-09-10
1994-01-11
Lindsey, Rodney M.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Head driving structure
81436, F16B 2300
Patent
active
052775313
ABSTRACT:
A device includes a member having an axis and a socket recess formed axially therein. The recess is polygonal in shape at its open outer end and has planar drive surfaces parallel to the axis alternating with retaining surfaces disposed at the corners of the polygonal shape and sloping inwardly of the recess toward the axis. Each of the retaining surfaces is substantially triangular in shape, having one apex at the adjacent corner at the outer end of the recess and having the other apices in adjacent drive surfaces at the inner end of the recess. The device may be a rotatably drivable device, wherein the axis is the axis of rotation.
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Lindsey Rodney M.
Snap-on Tools Corporation
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